Envi sci Flashcards
refers to the number of individuals
living in a particular area from a village
to the whole world
Population
Total population now
8.1 billion
Population growth causes poverty and
environmental degradation
True
British Philosopher & Economist
Author
Thomas Malthus
Book of Thomas Malthus
An Essay on the Principle of
Population
According to him , human populations would
outstrip their food supply and
collapse into starvation, crime,
and misery.
Thomas Malthus
According to him, populations would continue to
expand until growth is stopped
or reversed by disease, famine,
war or calamity.
Thomas Malthus
Occurs when population growth outpaces agricultural production, causing famine or war, resulting in poverty and depopulation.
Malthusian catastrophe
A German Philosopher, Father of Communism
Karl Marx
According to him, population growth results from
poverty, resource depletion,
pollution, and other social ills.
Karl Marx
According to him, to slow population growth,
people must be treated justly,
and exploitation and oppression
be eliminated from social
arrangements
Karl Marx
The Poverty Cycle
- Family in poverty
- Child grows up in poverty
- Is significantly disadvantaged in education and skills
- Struggles to get a job
- Fail to escape the poverty cycle
Mathematical Biologist
Populations Professor
Rockefeller University, New York
Joel Cohen
He estimated the maximum human
population size the planet can
sustain.
Joel Cohen
based on his studies, the earth’s
carrying capacity has median
value of 10–12 billion
Joel Cohen
Professor Emeritus of Agricultural
Sciences, Entomology & Ecology
Cornell University
David Pimentel
“By 2100, if current trends
continue, twelve billion
miserable humans will
suffer a difficult life on
Earth.”
David Pimentel
Food supplies have increased faster than
population growth since Malthus’ time
True(sa optimist)
progress in agricultural productivity, engineering,
information technology, commerce, medicine,
sanitation, and other achievements of modern life
have made it possible to support approximately
1,000 times as many people per unit area as was
possible 10,000 years ago
True(sa optimist hehe)
The impact of human activities
measured in terms of the area
of biologically productive land
and water, required to produce
the goods consumed and to
assimilate the wastes
generated.
Ecological Footprint
the land and water area
we use and
NEEDED TO PRODUCE THE RESOURCES
to absorb our
wastes
footprint = DEMAND
the amount of biologically productive
resources we use
our
AREA AVAILABLE TO PROVIDE THE
and to absorb
waste
biocapacity = SUPPLY
The capacity of ecosystems to produce useful biological materials and to absorb waste materials generated by humans
Biocapacity
Biocapacity < footprint
Ecological Debtor / Ecological Deficit
Biocapacity > footprint
Ecological Creditor/Ecological Reserve
Professor
University of Maryland
Julian Simon
He said people are the ultimate resource
Julian Simon
According to him, no evidence shows that
pollution, crime, unemployment,
crowding, the loss of species, or
any other resource limitations
will worsen with population
growth.
Julian Simon
Danish Economist
Ester Boserup
According to him, an increase in population would
stimulate technologies to
increase food production
Ester Boserup
The mother of invention
Necessity
In times of
pressure, people will find ways
to increase food production by
increasing the workforce,
machinery, and fertilizers.
Boserup’s Theory
Birth rate is relatively higher than mortality rate
True
5 children every second
1-2 dies
True
2.5 humans per second average
True
how many people are added per year
around 75 million at 1.1% global rate
Was the most
populous country
throughout the twentieth
century;
China
Is expected
to pass China in the
twenty-first century
India
which had only 33
million residents in 1950, is
forecast to have 299
million in 2050
Nigeria
The physical ability to reproduce
Fecundity
The actual production of offspring
Fertility